MAX2741ETI Ver la hoja de datos (PDF) - Maxim Integrated
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MAX2741ETI Datasheet PDF : 13 Pages
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MAX2741
Integrated L1-Band GPS Receiver
Typical Application Circuit
100pF
22pF
VCC
680pF
5.6pF
680pF
39pF
470µH
470µH
39pF
680pF
5.6pF
680pF
VCC
GPS RF INPUT
FROM GPS BPF
VCC
VCC
VCC
28
27
26
25
24
23
22
100pF
22pF
100pF
2.2pF
6.2nH
100pF
22pF
1nF
100pF
100nF
100pF
VCC1 1
∑
MAX2741
N.C.
2
RFIN
LNA
3
1612.8MHz 90 /2
VCC2 4
VCC3 5
VCC4 6
VCO
3225.6MHz
33.6MHz
0
/96
/16128
ADC
P.D.
200kHz
/R
/192
MUX
16.8MHz
GND
7
SPI INTERFACE REF
OSC
8
9
10
11
12
13
14
SDO
21
N.C.
20
19 VCC5
GPSIF0
18
100pF
GPSIF1
17
GPSIF2
16
GPSCLK
15
SPI DATA OUT
TO BASEBAND
PROCESSOR
VCC
1nF
GPS DATA AND
CLOCK TO
BASEBAND
PROCESSOR
22nF
36kΩ
100pF
220pF
SPI CLOCK AND DATA INTO
BASEBAND PROCESSOR
H/W SHUTDOWN LINE
FROM BASEBAND PROCESSOR
SYSTEM TCXO
(2MHz TO 26MHz)
Table 9. Digital Test-Mode-Select Description
MODE
3
2
1
0
REGISTER SETTING
CONFIG1:D9 to D8
11
10
01
00
GPSIF2
SIGN
M COUNTER
CHARGE PUMP UP
CML CLOCK
DIGITAL OUTPUT FUNCTION
GPSIF1
LSB
R COUNTER
CHARGE PUMP DOWN
CALIBRATE LPF END
GPSIF0
MSB
HANDSHAKE STATUS
SDO
XTL CLOCK SELECTED
Digital Test Bus
The digital test bus (DTB) is provided to allow for easy
bench analysis of the digital workings of the receiver.
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